CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 505	$ 447
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	(14)	2
Unrealized gains (losses) on forward contracts designated as hedges, net of tax	1	2
Unrealized gains (losses) on investments, net of tax	4	(5)
Total other comprehensive loss	(9)	(1)
Comprehensive income	$ 496	$ 446